"Say: We believed in Allah and what was revealed to us..." verse 136 from Surah Baqara, and in the second of the two: "I believe in Allah and I bear testimony that we are Muslims" (iii. 52).
Sahih Muslim Book 6, Hadith 121
← Previous Hadith " Say: O unbelievers," (Qur'an, cix.) and" Say: Allah is one" (cxii.).

Sahih Muslim Book 6, Hadith 120 Next Hadith → " Say: We believed in Allah and what was revealed to us" and that which is found in Surah Al-i-'lmran:" Come to that word (creed) which is common between you and us" (iii. 64).

Sahih Muslim Book 6, Hadith 122